Tunable passively harmonic mode-locked Yb-doped fiber laser with Lyot-Sagnac filter.

Applied optics

PubMedID: 26479821

Li M, Zou X, Wu J, Shi J, Qiu J, Hong X. Tunable passively harmonic mode-locked Yb-doped fiber laser with Lyot-Sagnac filter. Appl Opt. 2015;54(29):8800-3.
A novel passively harmonic mode-locked dissipative soliton Yb-doped fiber laser with all normal dispersion is proposed and experimentally demonstrated based on a semiconductor saturable absorption mirror and tunable Lyot-Sagnac filter. By only tuning the bandwidth of the filter at fixed pump power, the repetition rate of 9. 87 to 167. 8 MHz (corresponding to 17th-order harmonic) is obtained. This is the highest repetition rate and harmonic order for a passively harmonic mode-locked dissipative soliton Yb-doped fiber laser with all-normal dispersion to the best of our knowledge. The signal-to-noise ratio and super-mode suppression ratio for all harmonic orders are higher than 65 and 35 dB, respectively, which shows the high stability of the fiber laser.